#![allow(non_snake_case, unused_imports)]
use proconio::{fastout, input, marker::*};

#[fastout]
fn main() {
    input! {
        N: usize,
    }

    let mut F = vec![1, 1];

    for i in 0..100000 {
        let f = (F[i] + F[i + 1]) % N;
        F.push(f);
    }

    let mut zero_pos = vec![];

    for i in 0..F.len() {
        if F[i] == 0 {
            zero_pos.push(i);
        }
    }

    println!("{}", zero_pos[1] - zero_pos[0]);
}